期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 38, 期 21, 页码 8625-8630出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2013.04.131
关键词
Photocatalytic hydrogen generation; Metal sulfide; ZnS/ZnO; CuS; Hetero junction semiconductor
资金
- Ministry of Education, Culture, Sports, Science, and Technology of Japan [24510096]
- Postdoctoral Fellowship for Foreign Research for the Public Foundation of Chubu Science and Technology Center
- Grants-in-Aid for Scientific Research [24510096] Funding Source: KAKEN
The photocatalytic hydrogen production in the sacrificial S2--SO32- anions was investigated with ZnO in the addition of metal sulfides containing Ag2S, CuS, Fe2S3, and NiS. In the absence of metal sulfides, the photocatalytic H-2 evolution using ZnO was observed with 255 mu mol g(-1). The CuS amount and the concentrations of S2- and SO32- ions were optimized. It was found that ternary component semiconductor CuS/ZnS/ZnO was formed during the photocatalytic hydrogen production in the aqueous Na2S + Na2SO3 solution. The photocatalytic hydrogen evolution with CuS/ZnS/ZnO in the 0.4 M Na2S-0.4 M Na2SO3 solution was more than about 8.5 times better compared with those obtained with only ZnO. The CuS clusters on the surface of ZnS/ZnO seem to play an important role on the separation for electron-hole pair and the enhancement of H-2 production. Nano-sized ZnS/ZnO photocatalytic hydrogen technology has great potential for low-cost, environmentally friendly solar-hydrogen production to support the future hydrogen economy. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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